diff --git a/learn_file.txt b/learn_file.txt
index fe7d41d..f5169e7 100644
--- a/learn_file.txt
+++ b/learn_file.txt
@@ -1,2 +1,3 @@
 this a learn file.
-add content.
\ No newline at end of file
+add content.
+添加回滚
\ No newline at end of file